Unipolar spiral coil electrode for monitoring the electrical activity of the brain



FIG. 1 is a side elevational view of a unipolar spiral coil electrodefor monitoring the electrical activity of the brain, showing our newdesign, the broken line showing is for illustrative purposes only andforms no part of the claimed design;

FIG. 2 is a top plan view thereof; and

FIG. 3 is a bottom plan view thereof.

All undisclosed sides of the article are identical to that shown in FIG.1.

The ornamental design for a unipolar spiral coil electrode formonitoring the electrical activity of the brain, as shown and described.